Like Yik Yak, which first spread through high schools in the
Northeast, After School is making its starting rounds in Detroit,
where various school districts have taken action by alerting
parents via email about the app.

One Michigan high school began a petition to remove the app from
Apple's App Store indefinitely.

Re/code talked to After School’s creators — Cory Levy and Michael
Callahan (of One, a
San Francisco-based social media startup), and asked them some
questions about their app and about how they plan on combatting
the obvious strain of bullying that goes hand-in-hand with
anonymous apps such as theirs.

“Our job is to protect our users. … At this point we don’t have a
100 percent solution as to what that means,” Callahan
told Re/code. “Our main goal is to remove the worst of the
worst.” This was the case during the gun threat, which set off
the app’s automatic alert system at 2 am Monday morning. Callahan
and Levy say they called the local authorities and the school to
report the post.

The crux of the issue is After School’s unexpected popularity.
Since launch, users from more than 14,000 different high schools
across the country have already downloaded the app, says Levy.
For comparison, there are roughly 24,500 public high schools in total in the
United States.